Auto lock and alarm switch



w. F. TANNEFL AUTO'LOCK AND ALARM SWITCH.

APPLICATION FILED MAR 13, 1919. 1,437,998, Patented Dec. 5,1922.

8mm emf oz wom% Patented Den. 5, 1922.

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AUTO LOCK AND ALARM SWITCH.

Application filed March 13, 1919. Serial No. 282,311.

To all whom it may concern:

Be it known that 1, WILLIAM F. TANNER, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvementsin Auto Locks and Alarm Switches, of

which the following is a specification.

This invention relates to improvements in auto locks and alarm signals, and has for 1llS 0bj6Ct to provide a simple, cheap and efi'icient device to lock the starter, when self.

starters are employed, and at the same time the locking is done to break the circuit between the spark plugs and the ignition button, and to make the circuit from the ignition button to the signal horn, so that should the said ignition button be pushed in to start the car, the horn will be sounded and alarm given. When the device is used on a car not equipped with a self-starter the locking breaks the circuit between the ignition button and the spark plugs and makes the circuit between the said ignition button and the horn, so that an attempt to start the car will result in giving an alarm by the horn in the same manner as above described.

The invention consists of the novel construction and arrangement of the parts and combination of parts hereinafter more fully set forth in the following specification and pointed out in detail in the appended claim.

a In the accompanying drawing,

Figure 1 is a rear elevation of my invention showing the device in the unlocked position with the circuit established between the ignition button and the spark plugs.

Figure 2 is a front View of same.

Figure 3 is an enlarged rear View, also in the unlocked position.

Figure 4 is a top plan view of Figure 2.

Figure 5 is a similar view to Figure 3, but showing the same in the locked position.

Referring to the accompanying drawings, forming part of this specification, and in which like reference numerals designate like parts throughout the several views thereof, 1 designates the switch box, in which is secured the lock 2 operated from the outside by the key 3, and the switch 4 which is connected to the lock 2 by the rod 5 and adapted to be thrown in and out of contact with the contact plates 6 and 7 to make and break the circuit to the spark plugs, and between the ignition button and the horn. The selfstarting plunger 8 projects through the switch box 1 and is held to its normal position by the coiled spring '9. The contact are plate 6 is connected by the wire 10 to the coil 11 which in turn is connected to the timer 12 from which latter the wires 13 lead to the spark plug 14. The contact plate 7 is connected by the wire 15 to the-horn 16, and the switch 4 is connected by the wire-17 t0 the ignition button 18. The lock 2 is so arranged that when in the locked position, as shown in Figure 5, it projects across the inner end of the self-starting plunger 8 and prevents the latter from being pushed in to start the engine.

The operation of the device is as follows:

The parts being in the unlocked position, as shown in Figures 1 and 3, the ignition v button 18 is pressed in and the plunger 8 can be operated to start the engine. When it is desired to lock the device the key 3 is turned forcing the lock inner end of the plunger 8, as shown in Figure 5, so that the said plunger cannot be operated, and at the same time, through the medium of the rod 5, throwing the switch 4 v over against the contact plate 7 thus breaking the circuit between the ignition button and the spark plugs and making the circuit between the ignition button and the horn, so that when the ignition button is pushed in the horn will be sounded and alarm given that some one is attempting to start the car.

When the device is used on a car not equipped with a self-starter, the lock operates to break the circuit between the ignition button and the spark plugsand to establish the circuit between the ignition button and the horn, when in the'locked position, there-v by causing the horn to besounded and alarm given in the event at attempt is made, by an unauthorized person, to start the car before the device is unlocked.

Having thus described my invention, what I claim is:

An auto lock device comprising a box, a plunger projecting into said box, means to hold the said plunger in its normal position, a contact plate, a second contact plate, a switch plate between said two contact plates, a lock, and a rod connected to said switchplate and lock whereby when the lock is turned the contact of said switch-plate will be changed from one of said contact plates to the other and hold the plunger from being operated when in the locked position.

In testimony whereof I afiix my signature.

WILLIAM F. TANN 2 over across the 

